Yeah, I checked this out with a wrecker a while ago.
They are exactly the same, with the exception that the later winders were sealed units, and the motors were not servicable.
(Think this was the case around the EB series).
Anyway, the mounting points, and wiring plugs are exactly the same.
If you are looking at carrying out the conversion check out
I still need to scan in and sort out the Electrical side of the Document, but it gives you some idea of what to expect if you are going to tackle it on an EF/EL.